A class three pupil killed a 13-year-old girl after a fight between the two broke out.
The incident at Rangwe left neighbours in shock as police moved in to interrogate the suspect, 10.
He is said to be a pupil at God Luala Primary.
Neighbours said the two were fighting when the suspect hit the girl with a blunt object.
Area police boss Marius Tum said the girl slapped the boy leading to the fight.
“The preliminary information we have is that the boy became furious and decided to retaliate. He picked a stick on the ground and hit the girl on her forehead,” Tum said.